Apparatus for constructing hollow reinforced-concrete walls.



R. S. MARVIN.

APPARATUS FOR CONSTRUCTING HOLLOW REINFORCED CONCRETE WALLS.

APPLICATION FILED JULY 2.19M.

mAmAw, Patented July '27, 1915.

ROBERT S. MARVIN, OF SANTA MONICA, CALIFORNIA,

APPARATUS FOR CONSTRUCTING HOLLOW REINFORCED-CONCRETE WALLS.

Specification of Letters Patent.

Patented July 27, T915.

Application filed July 2, 1914. Serial No. 848,690.

To all 1071 am it 112 any concern:

Be it known that I, ROBERT S. MARVIN, a citizen of the United States,residing at Santa Monica, in the county of Los Angeles and State ofCalifornia, have invented new and useful Improvements in Apparatus forConstructing Hollow Reinforced-concrete Walls, of which the following isa specification.

This invention relates to certain new and useful improvements inapparatus for constructing hollow reinforced concrete walls, and theprimary object thereof is to provide an apparatus of novel and improvedform whereby the walls or slabs may be formed in a horizontal positionand then moved to a vertical position. upon the foundation or upon otherslabs which have been previously placed in position.

In the drawings, the figure is a side elevation, partly in section ofthe invention.

The foundation F and the floor structure S are first placed in position,so that the apparatus forming the subject of the present invention maybe placed upon the floor structure S and supported thereby.

The invention includes a frame 1, pro vided with a pair of brackets 2which slidably support a vertical post 3, the post being held in upposition and against downward movement by a jack 4 which engages thelower end thereof and seats on the-base of the frame, which in turn'issupported by the floor structure, whereby by turning of the ack screwthe post may be lowered or raised.

A, horizontal shaft 5, preferably of tubular form, extends the length ofthe structure and is rotatably supported by two ori ore of the frames 1,but one of the frames being shown in the drawings. The shaft 5 seats inbearings 6 carried by the upper ends of the posts, and is held againstupward move ment relative to the bearings by straps 7,

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which straps are connected to the platform 8 on which the slabs or wallare formed. The slabs or, wall 9 are formed on the platform in anydesired manner by the use of reinforcing rods, or the like.

For the purpose of holding the wall against movement during the loweringthereof, stops 10 are preferably employed, which stops'are allowed toproject up into the molded wall during the formation of same, and areengaged by wedges 11, which also project up into the molded wall,Whereby upon setting of the wall, the wedges may be withdrawn so as toallow the stops to be easily removed from the wall after the latter hasbeen lowered and placed in position. To retain the rear end of the wallagainst outward movement during lowering thereof, a clip 12 is employedwhich engages the upper or outer face of the wall and thereby preventsoutward movement of same relative to the platform 8 during lowering ofthe platform.

Block and tackles 13 and 14: are used, the former to draw the outer endof the platform 8 downwardly and the latter to steady the upwardmovement of the rear end of the platform during lowering thereof, aswill be obvious upon reference to the drawings.

In operation, the wall is first formed on the platform, and upon settingthereof, wedge 11 is withdrawn, whereupon the block and tackle 13 ismoved to draw the front end of the platform downwardly, the block andtackle 14 being used to control and steady the upward movement of therear end of the platform. When the wall is in vertical position over thefoundation F and alined therewith, the jack screw is then rotated togradually lower the post 3 and therewith the platform and wall, untilthe wall seats on the foundation F, the parts having been previouslybuttered with cement or the like. The clip 12'is then removed, and theframe released from any suitably anchoring means, such as bolt 15, andmoved backwardly away from the wall on the rollers 16 which the frame isprovided with.

The walls are formed with an air space 9' by first spreading a layer ofconcrete on the platform with reinforcing rods 9 embedded therein, andafter setting of the concrete,

placing a layer of sand on top of the set layer of concrete, the rods 9projecting above the same, after which a top layer of concrete is placedon the sand and the rods 9". After the top layer of concrete setssufliciently, the sand is washed out with a jet of water underconsiderable pressure, thereby leaving the air space 9.

\Vhat is claimed is:

1. In an apparatus of the type set forth, a frame, bracketson the frame,a vertical post slidably connected to the brackets, a platform rotatablyconnected to the upper end of the post, a jack engaged with the lowerend of the post to hold same in raised position and to allow loweringthereof, and

means to move the platform from a horizontal to a vertical position.

2. In combination with a frame, a vertical post slidably connected tothe frame, a platform rotatably supported by the post, means engagingsaid post at the lower end thereof to support said post and the platformcar ried thereby so that they may bevertically adjusted to lower themwhen said platform is in vertical position.

3. In combination with a frame, a vertical post slidably connected tothe frame, a platform rotatably supported by the post, means to rotatethe platform about the post, and means to hold the post in up'positionand to enable lowering thereof with the platform.

4. In combination with a platform, carrying means for the platform,means for rotatably connecting the platform and the carrying means,means for supporting the carrying means, said carrying means beingmovable in said supporting means, and means engaging the platformcarrying nmeeee means to raise and lower the same in the means forsupporting the carrying means, and to hold the carrying means in raisedor lowered position.

5. In combination with a rotatably supported platform, a stop fixedadjacent one end thereof and adapted to be projected in a wall or thelike formed on the platform, a removable wedge having one end projectedin the wall and impinged against the stop therein, and means detachablyengaged with the other end of the platform and wall and serving inconjunction with the stop and wedge to prevent relative movement of the,wall and platform during rotation of the latter.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ROBERT S. MARVIN. Witnesses CYRUs T. HARRIS, J. M. ERIGKSON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

